Fable 5 Built a Deep Reasoning Machine.

I built THIS with Claudes Fable 5. It's a reasoning machine based on Karl Poppers epistemology.

Repo Specs HERE

Research Agenda HERE

DeepReason is a harness that makes an LLM argue with itself, on the record. You give it a hard open "why" question and it pushes the model to conjecture a spread of bold explanations, then criticize them: every candidate has to state what evidence would refute it, weak ones get argued down, and survivors compete head to head. The model proposes solutions; a deterministic harness does all the bookkeeping and decides.

Everything is written to an append-only log that replays byte for byte, so every claim it produces can be re-derived or challenged. The output isn't one confident paragraph but a map of which explanations survived scrutiny, which died and exactly why, and where the evidence genuinely can't decide. It also measures whether the model is still exploring or just circling its favourite ideas, and catches it when it stalls. A compact ~900-line version, MiniReason, runs a full pass for cents.

DISCLOSURE: I have a personal research agenda that I want to explore. About 10 years ago I wrote a thesis on the computability of Karl Poppers epistemology. It's only now I've been able to build something concrete because of Fable 5.

I studied mathematics. I am not a computer scientist or a software engineer, so any community help would be greatly appreciated.